US Open mobile app - FAIL

Like many of you, I keep up to date on tennis scores through my smartphone. The US Open has their own mobile app which I installed on Android, and it only works less than half of the time! It fails to load or when it does load it does so very slowly and it takes forever to update.

Has anyone else had this problem or am I the only one? Is it any better on iPhone? I do not recall last year's app being this abysmal.